作物生长田间水分平衡的系统模拟

以作物生长模型MACROS(L1D)为基础，建立了土壤水分运动和作物生长耦合关系综合模拟系统. 着重介绍了SPAC体系水分运动子模型，并对土壤水分运动模拟的结果和各类参数的灵敏度等进行了分析.最后，应用该模拟系统对南方多雨地区冬小麦田土壤水分平衡和土壤渍害的发生过程进行了模拟分析。

Simulation of water balance in crop growth field

Based on the crop growth model MACROS (L1D), a dynamic coupling model for crop growth and water balance in field is established with the help of the relationship between soil water conditions and crop growth. The model includes three submodels; crop growth, water transmission in SPAC system, and coupling relationship between crop growth and soil water conditions. In this paper a ttention is focussed on the discussions of the simulation approaches for water balance in the crop growth field. comparing with the field experiment, the simulation results of soil water movement in crop growth and the sensitivities of some parameters about water balance have been analyzed. The model system has been used in simulating the water balance for winter wheat in rainy region of southern China, and in studying the processes of occurrouce and fading of soil waterlloging in this region.